Glass-cutting process for translucent articles



Aug. 18, 1925.

H. W. DYCH GLASS CUTTING PROCESS FOR TRANSLUCENT ARTICLES Filed 061;. 25, 1924 IJvvz'Ntz-oR J/arrg W D3 Patented Aug. 18, 1925.

PATENT] OFFICE.

HARRY W. DYO'H, OF PHILADELPHIA, PENNSYLVANIA.

GLASS-CUTTING PROCESS FOR 'IRANSLUCENT ARTICLES.

Application filed October 25, 1924. Serial No. 745,815.

To all wlaomz't may concern:

Be it known that I, HARRY W. DYoH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and Statewof Pennsylvania, have invented new and useful Improvements in Glass- Cutting Processes for Translucent Articles, of which the following is a specification.

My invention relates to new and useful improvements in a glass cutting process for translucent articles and more particularly to the cutting of designs on electric light bulbs or lamps which are translucent because of a frosted or painted surface or which are made translucent or semi-opaque in any other manner whatsoever.

In cutting designs, figures or the like on transparent electric lamps or other bulbous articles a portion of the translucent surface is removed in order to provide a transparent part through which a distant wall will be readily visible, then cutting the design or figure on the distant translucent wall in the ordinary manner and then again treatingthe transparent portion so as to again become translucent to a degree corresponding with or approximating the translucency of the balance of the article.

The fundamental steps of the process set forth above ,may be enlarged upon by adding the steps required to first make the bulbous article translucent which may be done by painting, acid etching, steel brush grinding with carborundum or other desirable method; next to polish the cutting in some well known manner as by the use of cork pumice and then removing the mark left between where the re-surfacing joins with the original translucent surface. Then again the fundamental process may be decreased by eliminating the step or removing the translucent surface from a part of the article which could be done where partly translucent bulbs are bought on the market.

\Vith these ends in view, this invention consists in the details of construction and drawings forming a partof this application, in which Fig. l, is a side elevation of an electric lamp or bulb of usual construction showing the entire glass body formed translucent.

Fig. 2, is a similar view illustrating the completion of the step in the process where a portion of the glass body has been made transparent.

Fig. 3, is an end viewof the electric light bulb illustrating that step in the process at the completion of the cutting. a

Fig. 4, is a side elevation of a finished electric light bulb produced by the use of my process.

In carryin out my invention as here einbodied, I ta e an ordinary electric lamp bulb: including a glass body 2 and a threaded metal plug 3 and I make the glass body portion translucent, ordinarily called frosting, by painting, acid etching or grinding the surface of the same and where the frosting is done by the grinding process generally a steel brush with carborundum thereon is used.

lVherever the word frosting is used throughoutthis description it is to be understood that it includes any way in which the outer surface of the glass body or bulb. is made translucent.

The translucent or frosted glass body is next treated in some desirable manner for removing a portion of the translucent or frosted surface in order to provide a transparent portion 4 in addition to the translucent portion 5, as shown in Figs. 2 and 3. Where this translucent or frosted surface is formed by acid etching it may be removed by the use of a cork wheel fed with pumice as is well known.

When the glass body or bulb is in this condition the wall of said body or bulb. opposite the transparent portion is readily visible through said transparent portion and due to the semi-transparent condition of the translucent portion the cutting wheel may be discerned by the operator during the cut-ting of designs or figures 6 thereon.

After a translucent portion of the bulb has been cut it is polished so as to give a finished sheen to the cutting.

Next the transparent portion of the bulb is refrosted or again made translucent by refrosting said transparent portion in the particularly noted that electric lamps or bulbs treated by this process not only makes the article ornamental but permits the passage of more of the light rays without greatly reducing non glaring properties of a frosted bulb.

Cf course I do not wish to be limited to the precise methods described for carrying out the several steps of the process as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is 1. The process of cutting translucent bulbous articles which comprises the cutting of a design on a translucent surface by 'iewing the cutting operations through a transparent wall of the article and then making the transparent portion translucent.

2. The process of cutting figures on bulbous translucent articles comprises removing a portion of the translucent surface of the article so as to provide a transparent portion, then cutting the translucent portion by viewing the cutting operations through the transparent portion and then making the transparent portion translucent.

A glass cutting process which comprises making a bulbous article partly translucent thereby leaving a transparent portion,

cutting the translucent portion by viewing the cutting operations through the transparent portion and then making the transparent portion translucent.

i. A process for cutting bulbous glass articles which comprises the treating of the exterior surface of said article to make the same translucent, then removing a portion of the translucent surface to provide a transparent portion, then cutting the translucent surface by viewing the cutting operations through the transparent portion, and then again treating the transparent portion to make it translucent.

A process for cutting bulbous glass articles which comprises the treating of the exterior surface of said article to make the same translucent, then removing a portion of the translucent surface to provide atransparent portion, then cutting the translucent surface by viewing the cutting operations through the transparent portion, then again treating the transparent portion to make it translucent, then polishing the cutting, and then obliterating the mark of connection between the two translucent portions.

6. The process of cutting translucent l.-.ulbor.s articles which comprises the cutting of a design'on a translucent surface by viewing the cutting operations through a trans- 1 eat wall of the article and then making transparent portion translucent, then polishing the cutting, and then grinding the c "face of the article in the region of the meeting line between the two translucent portions to substantially obliterate said meetingline. Y r

In testimony whereof, I have hereunto allixed my signature.

HARRY V. DYCH. 

